二维地址码对OCDMA系统误码率性能的研究

摘要

介绍了二维二次素数码、二维光正交码及二维Rs地址码的构造,讨论了它们对OCDMA系统误码性能和用户容量的影响.通过仿真分析了二维地址码的用户容量与码长、码重的关系,以及误码率随同步用户数、判决门限的变化曲线.结果表明,对于二维OCDMA系统,在判决门限一定的条件下,同步用户数越大,系统的误码率越低;系统同步用户容量随着码长、码重的增大而增大.%In this paper,the construction of two dimensional address code of sspc、Occ and RSC is introduced.The bit error rate and user capacity of OCDMA system with address code is discussed. Through simulation sofiware,I emphasisly analysis the relevance of two-dimensional address code of the user capacity and code length,code weight,as well as the bit error rate with the number of simultaneous users,decision threshold curve. The result shows:for two-dimensional OCDMA system, the threshold must under certain conditions, the greater the number of simultaneous users,the system's bit error rate lower;the biger of the code-weigth and itslength ,the biger of the system user capacity of synchronous code.